The invention discloses an angle steel supporting frame. The angle steel supporting frame comprises a box body, a storage supporting structure is arranged in the box body, the storage supporting structure comprises a layering plate, notches, a base plate, sliding grooves, auxiliary grooves, a connecting block, sliding wheels, a rectangular frame, a connecting rod, a baffle, a sliding through hole,a telescopic rod, a door-shaped plate, a limiting groove and a rectangular opening, the layering plate is arranged on the inner wall of the box body, the notches are formed in the top surface of thebox body and the bottom surface of the interlayer plate, the sliding grooves are formed in the two opposite side walls in the box body, the auxiliary grooves are formed in the two opposite side wallsof the sliding grooves, the sliding wheels are embedded in the auxiliary grooves, the door-shaped plate is connected to the output end of the telescopic rod and is embedded in the limiting groove, therectangular opening is formed in the side wall of the door-shaped plate. According to the angle steel supporting frame, the angle steels can be more comprehensively stored and is convenient to take,the phenomenon that a wet phenomenon occurs the angle steels due to long-time stacking is avoided, and the anti-theft effect is achieved.